Shaft bearing



May 13 1924. 1,493,598

T. v. BLJCKWALTERi SHAFT BEARING Filed Oct. 29. 1923 [77 Vel? Patented May 13, 1924.

UNITED STATES PATENT OFFICE.

TRACY v. BUCKWALTER, OF CANTON, OHIO, ASSIGNOR TO THE TIMKEN BOLT-:EB BEARING COMPANY, OF CANTON, OHIO, A CORPORATION 0F OHIO.

SHAFT BEARING.

Application led October 29, 1928. Serial ll'o. 671,345.

To all 'whom 'it 'may concern:

Be it known that I, Timor V. BUCK- WALTER, a citizen of the United States, and a resident of the city of Canton, in the county of Stark "and State of Ohio, have invented a new and useful Improvement in Shaft Bearings, of which the following is a specication.

This invention relates to bearings for the shafts of machinery such, for instance, as the oil containi bearing casing for the armature shaft o an electric motor. AOne of the principal objects of the present invention is to prevent the" escape of lubricant from the bearing casingv through the shaft receiving opening thereof during bothr forwar Another object'is` to preventthe entry of dust or other foreign matter into thepcasing through yits shaft-receiving opening during* the forward rotation of the shaft. Other `section 1s lock objects are simplicity'andchea ness of -construction 'and compactness yof The invention consists principally in a bearing for a shaft wherein one of said members is formed with an annular groove and reversely inclined threads on opposite sides of said groove, whereby the escape of lubricant through the shaft receiving o ening of said bearing is prevented regard ess of the direction of rotation of said shaft, and the entry of foreign matter into said bearing through said opening is prevented durf ing the forward drive. The invention also consists in the construction and arrangement of parts hereinafter described and claimed.

In the accompanying drawing, which forms part of this specification and wherein like symbols refer to like parts wherever they occur,

Fi 1 is a sectional view of a portion of an e ectric motor provided with an armature shaft and bearing embodying my invention; and

Fig. 2 is a view similar to Fig. 1 showing a modified form of the invention.

For purposes of illustration, my invention is shown in connection with the armature shaft A and the oil containing bearing casing B of an electric motor. The bearing casing B comprises two. cooperating cupshaped members or sections 3 and 4 which are preferably threaded together. The 'cup section 3 of the hollow bearing casing B and is and reverse v rotation ofl the shaftfl of the s aft opening by means of'a conica is mounted in an opening provided therefor in the standard or framework 5 of the motor; and the cup section 4 is secured to the side of said frame by means of capscrews 6. The cup section 3 is threaded onto the cup section 4 and is rovided at its outer corner with a series o notches 7 ada ted to receive a locking piece or key in the orm of a plate 8 which is removably secured in position by means of the cap-screw 6. The purpose of this finger 8 is to secure the cup section 3 against rotation. One end of the armature shaft A projectsv through a circular openin in the hub-like portion 9 in the cup mem er 4 ofthe bearing casing B referably supported independentl roller bearing 10 mounted in the section 3 o'f said casing. This bearing may be adjusted to take up wear by rotating the cup section 3 in the roper direction. The cup in the desired adjusted position by means of the finger 8.

The shaft receiving opening in the hub portion 9 of the cup me -nber 4 of the bearing casing is provided with an annular groove 11 which communicates with the interior of said bearing casing, near the bottom thereof, through a bleed hole or passageway 12. The shaft receiving opening in the hub portion 9 of the bearing casing is provided on each side of the annular groove 12 with a helical groove or internal thread. The outer thread 13 is inclined in a direction that will force back any dust or other foreign matter that tends to creep along the shaft and enter the bearing through the shaft receiving opening therein during the forward rotation of the shaft; and the inner thread 14 is inclined in a reverse direction so as to prevent the escape of oil through the shaft receiving opening during the forward rotation of said shaft. In other words, the shaft receiving opening in the bearing casing is provided on one side of the annular groove 11 with a left hand thread and is provided on the other side of said oove with a right hand thread. Thus, uring the forward drive, the oppositely inclined helical ooves or threads operate to prevent entry o dust into the casing and the escape of oil therefrom through the shaft opening therein. In the reverse rotation of the armature shaft. oil that tends to escape from the bearing casing through the outer end of the-'shaft is the' u threads113' an thrown by centri gal force into the annular groove 11 where 1tA ls'returned to .the bearing casing through the! bleed hole 1 2v atthe bottom 'of said 'annular groove., 'The bearingglcasing is. rovlded with an oil filling -QPB'IIH that isc osed'by' casing tofbe a threaded plu '15, there y permittin said :fedto. th'el proper leve with oil. A removable stoioper ordrain pug 16 is threaded into the ttomof the aring casing for drainin the oil when necessary. In` the modified-` construction shown in Fig. 2,'the armature shaft passes through alined openings inthe hub portions 9* of the two sectlons 3 anda'L of the bearing casing B'. Each shaft opening is provided with an annular groove 11* .andoppositely inclined threads on each side ofthe groove. These inwardly along the shaft into the annular threads are inclined in a direction that will prevent entry of dust intothe. bearing casmg andthe escape of oil therefrom through the .shaft v receivingopenings at the .ends thereof during the `forward drive. During, "thereverse drive, the outer threads prevent theescape of oil from the casing throu h the shaft openings thereof' by forcing` t ej; oil

grooves in the shaftopenings where it is-returned to the, bearlng casing through -the an opening adapted to receive said shaft,

one of said members being formed with an annular groove communicating with said casing and reversely inclined helical grooves on opposite sides of said annular groove adapted to prevent the escape of oil from said casing through said shaft opening during the forward -and reverse rotation of said shaft.

v2; The combination with a rotating shaft, of an oil containing bearing casing having an opening` adapted to receive said shaft` said shaft opening being formed with an annular groove communicating with said casing and reversely inclined helical grooves onv opposite sides of said annular groove, thereby preventing the entrv of foreign matter into said casing through said shaft opening during the forward rotation esaid shaft and the escape of oil from said casing through said shaft opening during the forward and reverse rotation of said shaft.

of an oilcontaining bear-ing casing aving means -inde ndentof said -shaft openin for rotatab supporting said.' shaft in said aan' opening adaj'ated togrec'eive said shaft and'.

casing.. said `shaf t opening being formed communicates with the lower portion of s aid casing'and reversely inclined helical grooves on opposite sides of .said Vannular -groove, said elical grooves beig'inclinedin direcwith an annular groove whose lower portion tions .that prevent entry of oilint'o said shaftl opening during the forward .and reverse ro-l tation of said shaft; y .l

4. The combination with afrotatingshaft,fv

of anv oil containing bearing casing havin an openl-ngiat each end forreceiving sal shaft, said shaftopenings being' each provided with an annulargroove communicat- .ing with the interior ofsaid casino" and reverselyinclined 'helical' grooves. adapted to prevent'the escape ofy oil from said bearing' -through saidshaft openings inthe-forward and reverse rotation of'said shaft.

A5. The combination with arotating shaft,

vofan oil containingibearing casing having an opening at each end for receiving said shaft,n1eansA independent of said shaft for rotatablysupporting saidshaft in said bearing, said shaft openings being each1 provided with an annular groove communicat'- ing with the interior of said casing and reversely inclined helical grooves adapted to prevent the entry of foreign matter into said casing through saidopenings in the forward rotation ofsaid shaft and-the escape.

of oil from said bearing through said shaft openings in the forward and reverse rotation of said shaft.

6. The combination with 4a rotating shaft, of an oil containing bearing casingv comprising cup-shaped sections detachably secured together, one of said sections having an opening fog receiving said shaft, means in the other of said sections for'- rotatably supporting said shaft independently of the shaft opening in said first mentioned section, said shaft opening being/formed with an annular groove communicating with the interior of said casing and reversely inclined' helical grooves on opposite sides of said annular groove adapted to prevent the escape of oil from .said casing through said shaft openings during the forward and reverse rotation of said shaft. l v

7. The combination with a rotating shaft, of an oil containing bearingcasing comprising cup sections detachably secured together,

each of said sections having an opening for receiving sald shaft, means .m one of said helical grooves on opposite sides of said annular groove, said helical grooves being inclined in directions adapted to prevent the escape of oil from said casing; through said shaft openings during the forward and reverse rotation of said shaft.

8. The combination With a rotating shaft, of an oil containing bearing casing having an opening adapted to receive said shaft, one

10 of said members being formed with a groove and reversely inclined helical grooves on`opposite sides of said groove adapted to pre `vent the escape of oil from said casing through said shaft opening during the forward and reverse rotation of said shaft, said casing having a passageway extending from the interior thereof to said groove.

Signed at Canton, Ohio, this 24 day of Oct., 1923.

TRACY V. BUCKWALTER. 

